Skip to main content

2011 profile-derived mean high water shorelines of the South Shore of MA used in shoreline change analysis

Dates

Publication Date
Time Period
2014-04-10

Citation

Himmelstoss, E.A., Farris, A.S., and Weber, K.M., 2018, Massachusetts shoreline change project: A GIS compilation of vector shorelines for the 2018 update: U.S. Geological Survey data release, https://doi.org/10.5066/P9O7S72B.

Summary

The Massachusetts Office of Coastal Zone Management launched the Shoreline Change Project in 1989 to identify erosion-prone areas of the coast. The shoreline position and change rate are used to inform management decisions regarding the erosion of coastal resources. In 2001, a 1994 shoreline was added to calculate both long- and short-term shoreline change rates at 40-meter intervals along ocean-facing sections of the Massachusetts coast. In 2013 two oceanfront shorelines for Massachusetts were added using 2008-2009 color aerial orthoimagery and 2007 topographic lidar datasets obtained from NOAA's Ocean Service, Coastal Services Center. This 2018 update includes two new mean high water (MHW) shorelines for the Massachusetts coast extracted [...]

Contacts

Attached Files

Click on title to download individual files attached to this item.

Shapefile: SouthShore_pShoreline_2011.zip
SouthShore_pShoreline_2011.CPG 5 Bytes
SouthShore_pShoreline_2011.dbf 5.72 KB
SouthShore_pShoreline_2011.prj 145 Bytes
SouthShore_pShoreline_2011.sbn 460 Bytes
SouthShore_pShoreline_2011.sbx 148 Bytes
SouthShore_pShoreline_2011.shp 88.62 KB
SouthShore_pShoreline_2011.shx 356 Bytes
SouthShore_pShoreline_2011_browse.png
“Browse graphic of the shoreline dataset.”
thumbnail 7.94 KB
SouthShore_pShoreline_2011.shp.html
“CSDGM metadata in HTML format for the shoreline data.”
76.55 KB
SouthShore_pShoreline_2011.shp.txt
“CSDGM metadata in TEXT format for the shoreline data.”
36.96 KB

Purpose

This mean high water (MHW) datum-based shoreline dataset was extracted using a profile method. The profile method for extracting shorelines was developed for open-ocean coasts. Shoreline positions serve as easily understood features that can be used to describe the movement of beaches through time. These data are combined with other shoreline positions and used to calculate rates of shoreline change. When this datum-based MHW shoreline is compared to historic proxy-based high water line shorelines there may be some artificial seaward offset of the historic data that is a known unidirectional offset between proxy-based and datum-based shoreline features. This shoreline data has an associated uncertainty table that quantifies the measurement and positional errors associated with this lidar shoreline, a proxy-datum bias value that corrects for the unidirectional offset between the mean high water (MHW) elevation of the lidar and the high water line (HWL) shorelines, as well as a measurement uncertainty in the total water level.

Additional Information

Shapefile Extension

boundingBox
minY41.7237956867209
minX-70.70615770459705
maxY42.16252710910125
maxX-70.27289131095958
files
nameSouthShore_pShoreline_2011.CPG
contentTypetext/plain
pathOnDisk__disk__d3/ad/33/d3ad3379a6d7f338a28a40930e1ff9d0d1584970
size5
dateUploadedTue Oct 30 12:17:58 MDT 2018
nameSouthShore_pShoreline_2011.dbf
contentTypeapplication/unknown
pathOnDisk__disk__56/76/3b/56763bdf96a5c713551d52bcad70f16ffad6904f
size5858
dateUploadedTue Oct 30 12:17:58 MDT 2018
nameSouthShore_pShoreline_2011.prj
contentTypetext/plain
pathOnDisk__disk__46/20/fa/4620fa7a21c1ea7e3007dce9dc616d6d8ea46c07
size145
dateUploadedTue Oct 30 12:17:58 MDT 2018
nameSouthShore_pShoreline_2011.sbn
contentTypex-gis/x-shapefile
pathOnDisk__disk__a1/21/b7/a121b7c3be2a97ec456dba4673744368a7151d3a
size460
dateUploadedTue Oct 30 12:17:58 MDT 2018
nameSouthShore_pShoreline_2011.sbx
contentTypex-gis/x-shapefile
pathOnDisk__disk__47/ad/76/47ad763558ebcd13c988ace91992e2e817541f0b
size148
dateUploadedTue Oct 30 12:17:58 MDT 2018
nameSouthShore_pShoreline_2011.shp
contentTypex-gis/x-shapefile
pathOnDisk__disk__51/2b/ee/512bee08801a1d5e3231a64df2d54116bd2ac258
size90748
dateUploadedTue Oct 30 12:17:58 MDT 2018
nameSouthShore_pShoreline_2011.shx
contentTypex-gis/x-shapefile
pathOnDisk__disk__4c/3b/af/4c3baf61ad7f11baa34cf5773e9ec5bde0bf9eee
size356
dateUploadedTue Oct 30 12:17:58 MDT 2018
nameSouthShore_pShoreline_2011_browse.png
titleBrowse graphic of the shoreline dataset.
contentTypeimage/png
pathOnDisk__disk__ea/15/55/ea15559eb5ec301dab2f1645d28111a301fd6213
imageWidth816
imageHeight1056
size8135
dateUploadedTue Oct 30 12:17:58 MDT 2018
nameSouthShore_pShoreline_2011.shp.html
titleCSDGM metadata in HTML format for the shoreline data.
contentTypetext/html
pathOnDisk__disk__63/63/73/6363733314da09a5e256081e5659e388eda91780
size78391
dateUploadedWed Nov 21 12:23:59 MST 2018
nameSouthShore_pShoreline_2011.shp.txt
titleCSDGM metadata in TEXT format for the shoreline data.
contentTypetext/plain
pathOnDisk__disk__7a/e0/64/7ae0640183e4ff1ae888fdecd0f95f5b4296e840
size37850
dateUploadedWed Nov 21 12:23:59 MST 2018
nameSouthShore_pShoreline_2011.shp.xml
titleCSDGM metadata in XML format for the shoreline data.
contentTypeapplication/fgdc+xml
pathOnDisk__disk__7c/2b/c5/7c2bc5851265cfa0a12d0caca948e61915755c79
dateUploadedMon Aug 10 14:12:39 MDT 2020
originalMetadatatrue
geometryTypeMultiLineString
nameSouthShore_pShoreline_2011
nativeCrsEPSG:4326

Item Actions

View Item as ...

Save Item as ...

View Item...